Wealth inequality has been growing for decades. The world's eight richest people have as much wealth as half of the world's population, and in the US, the proportion of people identifying as "have-nots" versus "haves" has more than doubled since 1988.

Credit Suisse's report did show that people are generally getting wealthier overall. In 2017, global average wealth hit a new high of $56,540, compared to $52,074 in 2007.

The world's ultra-wealthy are getting richer too, and to far greater degrees. In 2000, the top 1% held 45.5% of the world's wealth. Today, they hold 50.1% -- more than half of the rest of the world.

According to Credit Suisse's past reports, becoming a millionaire might be more common over the coming decades.

In 2013, the bank published a report speculating that 20% of the world's population could be millionaires within two generations. In other words, sometime before 2073 (as of the report's writing) there could be a billion millionaires walking the Earth.

The rapid influx of new wealth could even create the first trillionaire within a couple decades, according to a recent Oxfam report. There were 793 billionaires worldwide in 2009. Added up, their net worths totaled $2.4 trillion. By 2016, the richest 793 people maintained net worths of $5 trillion -- an annual growth of 11%.

"If these returns continue," the report stated, "it is quite possible that we could see the world's first trillionaire within 25 years."